LT1-LT4 Modifications 1993-97 Gen II Small Block V8

6-spd Problem

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Old Nov 21, 2007 | 07:48 AM
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Default 6-spd Problem

Having a strange problem with the M6, when shifting and giving some gas (right before engaging the next gear) there seems to be a strange vibration/feeling coming up through the shift, however, when you let off the gas completely between shifts, there's no problem. Also, it seems to do it more regulary with upshifts than downshifts. Clutch is a stock replacement (about 15K ago, they also did the flywheel), car has 118K on it (94 Z28). No problems with engaging the gear, and shifting itself is fine. A friend of mine says possibly a flywheel problem or that even the driveshaft might be out of balance. Any words of wisdom are greatly appreciated.
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Old Nov 21, 2007 | 08:57 AM
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is this under normal or hard driving conditions?
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Old Nov 21, 2007 | 09:56 AM
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Normal driving conditions, made a conscious effort not to drive it too hard once it started doing this.
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Old Nov 21, 2007 | 12:52 PM
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my drivetrain shimmys a little upshifting too. i think its cause of an unbalanced flywheel/clutch.
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Old Nov 21, 2007 | 02:03 PM
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does it make a weird noise too and has some restance sometimes along with the vibration?,
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Old Nov 21, 2007 | 02:58 PM
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No, the shifting into gear is smooth. There's no apparent loss of power like when a clutch is slipping.
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Old Nov 22, 2007 | 08:36 AM
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was the drive shaft installed in the exact position it came out? It sounds like a balance issue weather that be flywheel or drive shaft.
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